Erosion & Scour Mitigation - Revision history

Mpollei@gfnet.com at 20:51, 21 July 2023

2023-07-21T20:51:36Z

← Older revision		Revision as of 20:51, 21 July 2023
Line 12:		Line 12:
	\|caption=		\|caption=
	<!-- Add picture caption -->		<!-- Add picture caption -->
	Bridge scour at a cylindrical support ([https://www.usgs.gov/news/science-snippet/earthword-scour USGS, 2016])		Bridge scour at a cylindrical support.
			(Image Source: [https://www.usgs.gov/news/science-snippet/earthword-scour USGS, 2016])
	}}		}}

Grichards at 00:08, 27 January 2023

2023-01-27T00:08:58Z

← Older revision		Revision as of 00:08, 27 January 2023
Line 26:		Line 26:

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection)~~, USBR, 2014~~]]		{{Document Icon}} [[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\|Technical Manual: Overtopping Protection for Dams (FEMA P-1015)]]
	{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection)~~, USBR, 2013~~]]		{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection) (Reclamation)]]
	{{Document Icon}} [[Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25)\|Hydraulic Design of Stilling Basins and Energy Dissipators (~~EM 25~~)~~, USACE, 1984~~]]		{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection) (Reclamation)]]
			{{Document Icon}} [[Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25)\|Hydraulic Design of Stilling Basins and Energy Dissipators (USACE)]]

	==Trainings==		==Trainings==

Rmanwaring at 22:21, 19 December 2022

2022-12-19T22:21:43Z

← Older revision		Revision as of 22:21, 19 December 2022
Line 15:		Line 15:
	}}		}}

	“'''Degradation''' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.		“'''Degradation''' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>

	“'''Aggradation''' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.		“'''Aggradation''' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.<ref name ="USBR"/>

	“'''Scour''' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR"~~>[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]<~~/~~ref~~>		“'''Scour''' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR"/>

	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth of flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></~~ref~~>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth of flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"/>

	“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future [[environmental]] conditions below the dam." <ref name ="USBR"></~~ref~~>		“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future [[environmental]] conditions below the dam." <ref name ="USBR"/>

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection) ~~(Bureau of Reclamation)~~]]		{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection), USBR, 2014]]
	{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection) ~~(Bureau of Reclamation)~~]]		{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection), USBR, 2013]]
	{{Document Icon}} [[Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25)\|Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25) ~~(U.S. Army Corps of Engineers)~~]]		{{Document Icon}} [[Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25)\|Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25), USACE, 1984]]

	==Trainings==		==Trainings==

Grichards at 22:58, 13 December 2022

2022-12-13T22:58:13Z

← Older revision		Revision as of 22:58, 13 December 2022
Line 21:		Line 21:
	“'''Scour''' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>		“'''Scour''' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>

	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth of flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>

	“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future [[environmental]] conditions below the dam." <ref name ="USBR"></ref>		“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future [[environmental]] conditions below the dam." <ref name ="USBR"></ref>

Grichards at 22:56, 13 December 2022

2022-12-13T22:56:24Z

← Older revision		Revision as of 22:56, 13 December 2022
Line 15:		Line 15:
	}}		}}

	“''Degradation'' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.		“'''Degradation''' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.

	“''Aggradation'' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.		“'''Aggradation''' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.

	“''Scour'' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>		“'''Scour''' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>

	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>

Grichards at 22:56, 13 December 2022

2022-12-13T22:56:00Z

← Older revision		Revision as of 22:56, 13 December 2022
Line 15:		Line 15:
	}}		}}

	“'Degradation' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.		“''Degradation'' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.

	“'Aggradation' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.		“''Aggradation'' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.

	“'Scour' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>		“''Scour'' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>

	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>

Grichards at 22:55, 13 December 2022

2022-12-13T22:55:36Z

← Older revision		Revision as of 22:55, 13 December 2022
Line 15:		Line 15:
	}}		}}

	~~“Degradation~~ – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.		“'Degradation' – The long-term process by which streambeds and floodplains are lowered in elevation due to the removal of material from the boundary by flowing water.

	~~“Aggradation~~ – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.		“'Aggradation' – The long-term process by which streambeds and floodplains are raised in elevation due to the deposition of material eroded and transported from other areas.

	~~“Scour~~ – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>		“'Scour' – The enlargement of a flow section by the removal of boundary material through the action of fluid motion during a single discharge event. The result of the scouring action may or may not be evident after the passing of the flood event”.<ref name ="USBR">[[Computing Degradation and Local Scour \| Computing Degradation and Local Scour, USBR, 1984]]</ref>

	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>

Grichards at 02:19, 18 November 2022

2022-11-18T02:19:37Z

← Older revision		Revision as of 02:19, 18 November 2022
Line 1:		Line 1:
	__NOTOC__		__NOTOC__
			[[Category:Hydraulics]]
	----		----
	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
Line 22:		Line 23:
	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>

	“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future environmental conditions below the dam." <ref name ="USBR"></ref>		“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future [[environmental]] conditions below the dam." <ref name ="USBR"></ref>

	==Best Practices Resources==		==Best Practices Resources==

Grichards at 05:11, 17 September 2022

2022-09-17T05:11:04Z

← Older revision		Revision as of 05:11, 17 September 2022
Line 22:		Line 22:
	“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>		“The two basic factors influencing the extent of degradation in a stream channel are: (1) hydraulic properties including river channel velocities, hydraulic gradient or slope, and depth so flow associated with peak discharges and throughout the range in discharges, and (2) particle size distribution of sediments in the channel bed and banks. A careful evaluation of these factors is essential to any degradation analysis. One additional factor is the combination of streambed and valley controls which may exist in the channel reach subject to degradation. The controls may be rock outcrops, cobbles and boulders in the channel, vegetation growing along the banks, or manmade structures which act to control water levels and retard degradation processes. A control in the channel may in some cases prevent any appreciable degradation from occurring above it. Conversely, a change or removal of an existing control may initiate the degradation process”. <ref name ="USBR"></ref>

	“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future environmental conditions below the ~~dam…~~		“Before undertaking any degradation study below a dam, an evaluation is needed of the degree of detail required to complete the study, of the appropriate design data for the dam, and of the future environmental conditions below the dam." <ref name ="USBR"></ref>

	~~“Most existing rivers or streams are in a quasi~~-~~equilibrium state when considered on a long~~-~~term basis. While in this state, the stream sediment processes~~ of ~~degradation~~ and ~~aggradation are relatively at a standstill~~ and~~, if occurring, are only of localized nature~~. ~~The state~~ of ~~stream equilibrium as described by Lan (1955~~) ~~may be expressed qualitatively by the following equation:~~		==Best Practices Resources==
			{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 7: Riprap Slope Protection) (Bureau of Reclamation)]]
			{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection)\|Design Standards No. 13: Embankment Dams (Ch. 17: Soil-Cement Slope Protection) (Bureau of Reclamation)]]
			{{Document Icon}} [[Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25)\|Hydraulic Design of Stilling Basins and Energy Dissipators (EM 25) (U.S. Army Corps of Engineers)]]

	~~<center>'''''Q<sub>s</sub> * D<sub>m</sub>~~ = ~~k * Q<sub>b</sub> * S<sub>b</sub>'''''</center><br>~~		==Trainings==
			{{Video Icon}} [[On-Demand Webinar: Rock Scour Assessment for Dams, Spillways and other Water Conveyance Structures]]
	~~“It is recognized that in some situations~~ other ~~hydraulic parameters may be equally important as slope.~~		{{Video Icon}} [[On-Demand Webinar: Designing Slope Protection for Dams and Levees]]
			{{Video Icon}} [[On-Demand Webinar: Terminal Structures and Energy Dissipation at Outlet Works and Spillways]]
	“When any one of the four variables is altered, one or more of the other variables must adjust in order to return the stream to a state of equilibrium. An obvious case is when a dam and reservoir are constructed on a stream, eliminating or diminishing the sediment load downstream from the dam. The relatively clear water released to the stream below the dam is capable of eroding both channel bed and ~~banks when released in sufficient quantity. If the exposed bed~~ and banks are composed of sediment particles that can be moved or picked up by the flowing water, degradation will occur. The degradation process can occur vertically (streambed), laterally (streambanks), or both depending upon the stream discharge and the particle size and cohesive properties of the material forming the bed and banks. In the process of establishing a new state of equilibrium, the stream slope will decrease and the sediment particles remaining in the streambed after some time lapse will be the coarser fraction of the original bed material. Equation 1 provides a comparative evaluation which merely indicates an imbalance in channel equilibrium to be expected and that a change in regimen is imminent. To quantify this change requires application of sediment transport equations either in the form of a mathematical model or in less detail by the empirically tested equations and procedures described in this technical guideline. The effect of this change in regimen below a dam is to produce general degradation and lowering of tailwater elevations”.<ref name ="USBR"></ref>

	~~==Examples==~~
	~~{{Website Icon}}~~
	~~==Best Practices Resources==~~
	~~{{Document Icon}} [[Computing Degradation and Local Scour]]~~
	~~==Trainings==~~
	~~{{Video Icon}}~~

	<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->		<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->

Grichards: Grichards moved page Scour Analysis to Erosion & Scour Mitigation without leaving a redirect

2022-09-17T05:07:24Z

Grichards moved page Scour Analysis to Erosion & Scour Mitigation without leaving a redirect

← Older revision	Revision as of 05:07, 17 September 2022
(No difference)